A generation is about one-third of a lifetime. Approximately how many generations have passed since the year 0 AD?

What is the speed of light in furlongs per fortnight? The speed of light is 2.998×108 m/s. You might find the following conversions helpful in you calculation: • 1 furlong = 220 yds • 1mi = 5280 ft• 1 fortnight = 14 days

Acre-feet (af) is a unit that some non-scientists unwisely use to measure volume of liquids. By definition 1 acre foot is one foot multiplied by 1 acre. 1 acre is equal to about 4 × 104 ft2 . 1. How many cubic feet are in an acre-foot?

A student sees a newspaper ad for an apartment that has 1,846square feet (ft2) of floor space. How many square meters of area are there? Specify your answer up to 1 decimal place. Do not include units.

What is the height of a 4 ft 2.3 in tall person in meters? Hint The height of this person is m.

A typical sheet of paper is 8.5 inches wide and 11 inches long. Calculate the length of one sheet in cm? calculate the length of the sheet in millimeters and meters.

For about 10 years after the French Revolution, the French government attempted to base measures of time on multiples of ten: One week consisted of 10 days, one day consisted of 10 hours, one hour consisted of 100 minutes, and one minute consisted of 100 seconds.What are the ratios of (a) the French decimal week to the standard week and (b) the French decimal second to the standard second?

Bacteria and other prokaryotes are found deep underground, in water, and in the air. One micron (10-6 m) is a typical length scale associated with these microbes. (a) Estimate the total number of bacteria and other prokaryotes onthe Earth. (b) Estimate the total mass of all such microbes.

Energy has dimensins mass times distance^2 divided time^2. In these expressions, m is mass, x is distance, t is itme, v is speed, and a is acceleration. Which expressoin as dimensions equivalent to energy?   mx^2/t max ma/t max/t mv^2/x

The world population in billions is approximately P = 7.4e0.010" where t is in years since 2016. Estimate the relative rate of change of population in 2020 using this model and the values of At below. Round your answers to three decimal places. (a) At = 1 The relative rate of change is % per year. the absolute tolerance is +/-0.001 (b) At = 0.1 The relative rate of change is % per year. (c) At = 0.01 The relative rate of change is % per year.